Stop device for engines.



Patented Apr.- 20, 1909. Q

19i hwoceo I rm: NORRIS PE'IER: cc. WASHINUYON, n. c.

UNITED STATES PATENT OFFICE.

RUBIE S. COLEMAN, OF SIKESTON, MISSOURI.

STOP DEVICE FOR ENGINES.

To all whom it may concern:

Be it known that 1, Rome S. COLEMAN, a citizen of the United States, residing at Sikeston, in the county of Scott and State of Missouri, have invented certain new and useful Improvements in Stop Devices for Steam-Engines, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to improvements in steam engine stop devices and has for its object the production of a simple and practical device, whereby the supply of steam to the cylinder will be cut off when the driving belt of the governor breaks.

Vith the above and other objects in view, the invention consists of the novel features of construction and the combination and arrangement of parts hereinafter fully described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the invention applied to a well known form of centrifugal governor for steam engines, a portion of the governor easing being broken away to show the valve; Fig. 2 is a side elevation of the device or attachment removed from the governor; and Fig. 3 is a top plan view of the parts shown in Fig. 2.

Referring more particularly to the drawings 1 denotes the body or frame of the governor which forms a casing for the usual vertically sliding valve rod 2.

1 denotes the usual drive belt for rotating the centrifugal arms of the governor.

3 denotes a sleeve arranged upon the valve rod or stem 2 above the body 1 and provided at its lower end with an annular flange 3 forming a shoulder. Said sleeve or collar may be adjusted longitudinally on the valve rod by a set screw 3 or equivalent means.

6 denotes a supporting and attaching member preferably in the form of a plate having an opening 7 for the reception of the valve rod or stem 2 and adapted to be secured upon the top of the body 1 by set screws, bolts or the like 5. Formed on the projecting portion of the plate 6 is a pair of spaced lugs 8, 9, the upper portions of which are bifurcated to receive segmental members 10, 11. Said'members are pivoted in said lugs in longitudinal alinement with each other and upon their opposing ends are formed toothed segments which mesh with each other. The other or inner end of the member 10, which latter is in the form of a Specification of Letters Patent.

Application filed January 22, 1909.

Patented April 20, 1909.

Serial No. 473,649.

lever, has a forked or Y-shaped portion 12 which loosely receives the sleeve 3 at a point above its flange or shoulder 3 The other or outer end of the member 11, which latter is also in the form of a lever, has projecting from it an upwardly extending rod 13 with a right angularly bent extremity 14. The latter forms a journal pin for a roller or idler wheel 15 which is retained upon it by a transverse key 16 and which is adapted to rest upon the drive belt 1, as shown in Fig. 1, when the parts of the governor are in normal position. The engagement of the wheel 15 with one of the stretches of the belt 1 holds the arm or rod 13 in its elevated position shown in Fig. 1, but the instant the belt- 1 breaks, said parts will drop by gravity and thereby actuate the member or lever 10 so that its forked end 12 will engage the shoulder 3 of the sleeve 3 to actuate the latter dmvnwardly and hence to move the valve to its closed position to cut off the supply of steam to the engine cylinder. The loose connection provided between the sleeve or element 3 and its actuating means, namely, the member 10, permits the governor to operate and control the engine just as if the invention was not applied to the governor, but the instant the belt breaks the invention beeon'ies operative to close the governor valve. Said loose connection also prevents the ,device from interfering with the normal operation of the governor should the belt 1 be loose or should there be any uneven surfaces on the belt.

Having thus described the invention what is claimed is:

1. The combination with an engine governor having a body, a slidablc valve stem and a driving belt, of a sleeve secured upon the valve stem and provided with a shoulder, a supporting member secured upon the body, meshing gear segments pivoted upon the member and provided with oppositely proj ecting arms, a forked portion on the arm of one of said gear segments to straddle the sleeve and to engage the shoulder of the latter and a roller journaled upon the arm of the other gear segment and adapted to be normally supported by the belt and to drop by gravity when the belt breaks and thereby actuate the governor valve to its closed position.

2. The combination with an engine governor having a body, a valve provided with a slidable stem, and a driving belt for the governor, of a supporting plate secured to the body and provided with spaced lugs, a flanged sleeve secured to the valve stem above the body, meshing segmental gear members pivoted to said lugs and provided with oppositely projecting arms, the arm on one member having a forked portion to straddle said sleeve and engage its flange, the arm on the other member having a laterally extending portion, and a roller j ournaled upon the laterally extending portion of the last mentioned arm and adapted I to rest upon the belt whereby said last men tioned member Will be supported normally in an elevated position and will drop by gravity When the belt breaks and thereby actuate the governor valve to its closed position.

In testimony whereof I hereunto affix my signature in the presence of tWo Witnesses.

RUBIE S. COLEMAN. Witnesses DAN lVICCOY,

J. L. DEWITT. 

